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-rw-r--r--converter/other/fitstopnm.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/converter/other/fitstopnm.c b/converter/other/fitstopnm.c
index 86bae5d8..92ecfb78 100644
--- a/converter/other/fitstopnm.c
+++ b/converter/other/fitstopnm.c
@@ -34,6 +34,11 @@
   The official specification of FITS format (which is for more than
   just visual images) is at
   ftp://legacy.gsfc.nasa.gov/fits_info/fits_office/fits_standard.pdf
+
+  An example FITS file is at
+
+    http://fits.gsfc.nasa.gov/nrao_data/tests/incunabula/mndrll-8.fits
+
 */
 
 #include <string.h>